Patterns of abundance and dominance of the phytoplankton of Rostherne Mere, England: Evidence from an 18-year data set

Reynolds, C. S.; Bellinger, Edward G.

doi:10.1007/bf00877262

Cited by 78 publications

(40 citation statements)

References 24 publications

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“…Since the 1988 event, large-scale blooms of Chrysochromulina have not returned in the area. Numerous other studies have described similar patterns of interannual variability in plankton community composition (Reynolds & Bellinger 1992;Talling 1993;Harris & Baxter 1996;Arhonditsis et al 2004;Huisman et al 2006;Valdés et al 2007;Smetacek & Cloern 2008). In many of these case studies, the underlying causes for the observed interannual variability were not apparent.…”

Section: Discussion (A) Interannual Variability As An Intrinsic Propertymentioning

confidence: 69%

Interannual variability in species composition explained as seasonally entrained chaos

et al. 2009

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The species composition of plankton, insect and annual plant communities may vary markedly from year to year. Such interannual variability is usually thought to be driven by year-to-year variation in weather conditions. Here we examine an alternative explanation. We studied the effects of regular seasonal forcing on a multi-species predator-prey model consisting of phytoplankton and zooplankton species. The model predicts that interannual variability in species composition can easily arise without interannual variability in external conditions. Seasonal forcing increased the probability of chaos in our model communities, but squeezed these irregular species dynamics within the seasonal cycle. As a result, the population dynamics had a peculiar character. Consistent with long-term time series of natural plankton communities, seasonal variation led to a distinct seasonal succession of species, yet the species composition varied from year to year in an irregular fashion. Our results suggest that interannual variability in species composition is an intrinsic property of multi-species communities in seasonal environments.

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Section: Discussion (A) Interannual Variability As An Intrinsic Propertymentioning

confidence: 69%

Interannual variability in species composition explained as seasonally entrained chaos

et al. 2009

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“…cell count was reduced to less than 2% of the total found in the raw water. According to Drikas et al (2001) and Pietsch et al (2002), cell lysis may be caused by mechanical damage due to the turbulence and pressure in the pipes, feed tanks and filters , which is low when compared to removal achieved by other treatment steps. After filtration approx.…”

Section: Discussionmentioning

confidence: 99%

“…These blooms are a challenge for water treatment because it is difficult to remove the cells without leading to lysis and the consequent release of dissolved cyanotoxins in the water (Pietsch et al, 2002). The Brazilian Ministry of Health (MS) regulates the monitoring and quality control of water in reservoirs that have blooms of cyanotoxin-producing organisms (Ordinance 2914(Ordinance , 2011.…”

Section: Introductionmentioning

confidence: 99%

The effectiveness of conventional water treatment in removing <i>Ceratium furcoides</i> (Levander) Langhans, <i>Microcystis</i> sp. and microcystins

Almeida

Spiandorello²,

Giroldo

et al. 2016

WSA

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Algal blooms are a global problem due to various negative effects that can compromise water quality, such as the production of metabolites that are responsible for odour, colour, taste and toxins. In drinking water supplies algae can reduce the aesthetics of potable water when not readily removed by conventional water treatment processes. One of the major challenges in water treatment is the removal of cells without leading to lysis and the consequent release of dissolved metabolites in the water. The Maestra Reservoir, which is located in Caxias do Sul, RS -Brazil, is a small meso-to supereutrophic reservoir. The reservoir provides water for the Celeste Gobatto water treatment plant (Celeste Gobatto WTP) which uses the conventional method of treatment. This study aimed to evaluate the efficacy of conventional water treatment for the removal of algae, cyanobacteria and cyanotoxins. A bloom of Microcystis (Kützing) ex Lemmermann with a density of 23 163 cells•mL -1 , Ceratium furcoides (Levander) Langhans, (5 356 cells•mL -1 ) and a microcystin concentration of 1.97 μg•L -1 was found in the raw water reservoir. Samples sites were assigned the following numbers: (1) raw reservoir water; (2) WTP entry; (3) after sedimentation; (4) filtered water; and (5) treated water. Cell removal was evaluated by cell counting conducted with an inverted microscope, chlorophyll-a by a colorimetric method and microcystin by an enzyme immunoassay kit. Conventional water treatment was effective in removing chlorophyll-a, Microcystis sp. and Ceratium furcoides, mainly in the early treatment steps. Microcystin persisted until the last treatment step, when approximately 50% of the microcystin that had arrived at the WTP was removed by disinfection. Removal of these taxa and toxin was above 98%. Despite the efficacy of Ceratium furcoides removal, the presence of this dinoflagellate in treated water is considered to be large because of its large size.

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“…In general terms, N # -fixing cyanobacteria can compete for light but, below a certain availability of light, no diazotroph will thrive, due to the higher energetic costs of N # fixation (De Nobel et al, 1997 b). With the degradation of the standing crop and the mineralization of the organic nitrogen pool, non-diazotrophic and less light-demanding species will take over (Zevenboom & Mur, 1980 ;Reynolds & Bellinger, 1992).…”

Section: Ecological Implicationsmentioning

confidence: 99%

Comparison of the light‐limited growth of the nitrogen‐fixing cyanobacteria Anabaena and Aphanizomenon

et al. 1998

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The effect of simultaneous N # fixation and light limitation on the growth of two strains of Anabaena sp. Bory de St. Vincent and Aphanizomenon flos-aquae (L.) Ralfs was investigated using continuous cultures. Under severely light-limited conditions, Aphanizomenon showed a broader absorption spectrum (due to the presence of phycoerythrin), a higher maximum efficiency of photosynthesis, a higher steady-state N # fixation activity and a higher growth affinity for light than did Anabaena. On the other hand, under light saturation, Anabaena showed a higher maximum rate of O # production and a higher maximum specific growth rate than Aphanizomenon. These monoculture results characterize Anabaena and Aphanizomenon, in relative terms, as a ' sun ' and a ' shade ' species respectively, and are in accordance with field observations. The difference between the two species in their acclimatory response is discussed in terms of a species-specific alteration of the PSI : PSII stoichiometry. Besides the species-specific modulation of the accessory pigments, such an acclimation would provide a biochemical basis for the observed physiological differences. The monoculture results were used to differentiate the niches of the two species and suggested that Aphanizomenon would competitively displace Anabaena under N # -fixing, light-limited conditions. However, when both species were grown together, Anabaena became dominant and seemed to be the superior competitor for light. In order to explain this finding, the possible effects of release of allelopathic compounds, or dynamic aspects of light supply, are discussed.

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Patterns of abundance and dominance of the phytoplankton of Rostherne Mere, England: Evidence from an 18-year data set

Cited by 78 publications

References 24 publications

Interannual variability in species composition explained as seasonally entrained chaos

Interannual variability in species composition explained as seasonally entrained chaos

The effectiveness of conventional water treatment in removing <i>Ceratium furcoides</i> (Levander) Langhans, <i>Microcystis</i> sp. and microcystins

Comparison of the light‐limited growth of the nitrogen‐fixing cyanobacteria Anabaena and Aphanizomenon

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